Congrats on the CXT purchase! In 1982, you'd have been hard pressed to find a bike more exotic than the CX500TC. You may want to put a nice synthetic oil like the Mobil 1 4T in it,a motorcycle-specific oil, and a new filter. I'd flush the brake lines and be sure the calipers are not frozen, the rear one particularly, as you don't want to cook and warp the rotor. If it is already running as the recent video indicates, the fresh, high octane gas will make a world of difference compared to the year-old gas. Check the condition of the air filter. Are there any service records? It could have 29 year old coolant in it. The coolant that you buy should be free of abrasive silicates. The intake and exhaust valves may have never been adjusted, ever. At 21K miles, they may a little off. An overboost condition upon hard acceleration might indicate a stuck waste gate. If those tires are good, ride it some to knock the cobwebs off it and see if any problems need to be addressed.